post https://api-test.maast.com/platform/invoice//copy
Makes a copy of an invoice. The invoice date will be set to today's date, and the due date will be adjusted based on the invoice date and the payment terms.
To make a copy of the invoice with a different invoice number, include invoice_number in the POST body. Invoice payments from the original invoice will not be copied.
Note: This operation requires special permissions for vendor account use. Contact Maast Support to enable it.